Show:
Mental Math
Rounding Whole Numbers and Decimals
Addition of Decimals
Problem Solving
Subtraction of Decimals
100
Use mental math to add 2.1+0.9+1.2
4.2
100
Round to the nearest ten: 17
20
100
Find the sum: 3.28+6.09
9.37
100

Nate has a $5 bill and a $10 bill. He spends $2.50 on a smoothie and $2 for a muffin. How much money does he have left?

$10.50

100
Rose needs 22 hamburgers for a party. She has made 12 hamburgers so far. How many more does Rose need to make? Draw a picture to help!
10 more hamburgers
200
Use mental math to subtract 8.6-4.9
3.7
200
Round to the nearest ten thousand 427,468
430,000
200
Find the sum: $44.00+$91.46
$135.46
200
Mike has a length of wood that is 15.89 inches and another that is 7.24 inches. Round each piece of wood to the nearest tenth and find how much longer the first piece is.

8.7 inches long

200
Find the difference: 7.21-6.1
1.11
300
Use compensation to subtract 4.25-3.08
1.17
300
Round to the nearest whole number: 643.82
644
300
Juan adds 3.8+4.6 and gets a sum of 84. Is his answer correct? Write how you know.
No he is not correct because 84 is not close to the estimated answer of 4+5. He forgot to add the decimal point, so the sum should be 8.4
300

Elias saved $30 in July, $21 in August and $50 in September. He spent $18 on movies and $26 on gas. How much money does Elias have left?

$57

300
Find the difference: $4.08-$2.12
$1.96
400
Use compensation to add $3.47+$4.35
$7.82
400
Round to the nearest hundredth: 0.757
0.76
400
What is the sum of 45.09+2.005
47.095
400

There is a rectangle with a length of 14.75 meters and a width of 8.38 meters. What is the Perimeter of the rectangle with each side rounded to the nearest tenth. 

14.8 + 14.8 + 8.4 + 8.4 = 46.4 meters

400
The pyramid measured 143.5 meters high. The other pyramid measures 65.5 meters high. What is the difference in the heights of the two pyramids?
78 meters
500

On 3 different days at her job, Anne earned $27.50, $33.75 and $49.25. She needs to earn $100 to buy a new phone. The cost of the phone includes tax. If she buys the phone, how much money will she have left over?

$10.50

500
The world's largest blanket measures 4.26 meters around. Round 4.26 to the nearest ones place and to the nearest tenths place.
4 4.3
500
A balloon mural of the Chicago skyline measures 17.6m on one side and 26.21m on the other two sides. What is the perimeter of the mural?
87.62m
500

1,000 point Question!!! 500 for each answer.

Amber bought a book for $25.85 and coffee for $7.35. How much money did she spend? 

If she paid with $40, how much change will she get?

She spent $33.20

Her change is $6.80

500
An average person's leg bone measures 19.88 inches and the lower leg bone measures 16.94 inches. How much longer is the upper leg bone then the lower leg bone?
2.94 inches